/*
 * Copyright 2002-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Spring.Objects.Factory.Support;

/// <summary>
/// Object instantiation strategy for use in
/// <see cref="Spring.Objects.Factory.Support.WebObjectFactory"/>.
/// </summary>
/// <remarks>
/// <p>
/// This strategy checks if objects id ASP.Net page and if it is uses
/// PageParser to compile and instantiate page instance. Otherwise it
/// delagates call to its parent.
/// </p>
/// </remarks>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class WebInstantiationStrategy : MethodInjectingInstantiationStrategy
{
    /// <summary>
    /// Creates a new instance of the
    /// <see cref="Spring.Objects.Factory.Support.WebInstantiationStrategy"/> class.
    /// </summary>
    public WebInstantiationStrategy()
    {
    }

    /// <summary>
    /// Instantiate an instance of the object described by the supplied
    /// <paramref name="definition"/> from the supplied <paramref name="factory"/>.
    /// </summary>
    /// <param name="definition">
    /// The definition of the object that is to be instantiated.
    /// </param>
    /// <param name="name">
    /// The name associated with the object definition. The name can be the null
    /// or zero length string if we're autowiring an object that doesn't belong
    /// to the supplied <paramref name="factory"/>.
    /// </param>
    /// <param name="factory">
    /// The owning <see cref="Spring.Objects.Factory.IObjectFactory"/>
    /// </param>
    /// <returns>
    /// An instance of the object described by the supplied
    /// <paramref name="definition"/> from the supplied <paramref name="factory"/>.
    /// </returns>
    public override object Instantiate(
        RootObjectDefinition definition, string name, IObjectFactory factory)
    {
        if (definition is IWebObjectDefinition && ((IWebObjectDefinition) definition).IsPage)
        {
            return WebObjectUtils.CreatePageInstance(((IWebObjectDefinition) definition).PageName);
        }
        else
        {
            return base.Instantiate(definition, name, factory);
        }
    }
}
